Kensington 72123 Mouse-in-a-Box Optical USB Mouse DiamondEye optical technology responds to your fastest movements with accurate tracking and precise guidance Provides the convenience of 2 mouse buttons and a scroll wheel to reduce repetitive tasks to a single click Connects via USB and is guaranteed to work right out of the box on both PCs and Macs Backed by a five-year manufacturer's warranty and free technical support Ergonomically designed to be comfortable for both right- and left-handed users